The International Physics Olympiad (IPhO) is the World Championship Physics Competition for High School students and is held annually in a different country.
The first IPhO was held in 1967 in Poland. It has gradually expanded to over 80 countries from 5 continents. The IPhO International Board ensures that the competition takes place each year and that each host country observes the regulations and traditions of the IPhO.

ipho-unofficial.org is an online resource for past and upcoming Physics Olympiads.
It is unofficial and non-profit, and does not hold any rights over its contents. The data is taken from various websites including ipho.org, which is the official webpage of IPhO.
The theme and design of the webpage is based on imo-official.org.
ipho-unofficial.org is now open source! View on Github.